Cells in the wall of the mamalian stomach secrete HCL at a concentration of 0.1M.

The secreted -protons, which are derived from the intracellular hydration of CO2 by carbonic anhydrase, are pumped out by an (H+ k+) ATPase antiport transporter is also required to complete the overall transport system.

a) Calculate the pH of the secreted HCL. How does this compare to the cystolic pH of 7.4?

b) Write a reaction catalysed by the carbonic anhydrase enzyme.

c) Draw a diagram to show how the action of both transport proteins results in the secretion of HCL.

d) Explain how a proton pump inhibitor might be effective in the treatment of a stomach ulcer.

Can someone please point me in the right direction? Or just help me out with the first two questions..please?

Yes you have all the information, and you are right you can say that [H+]= - log10 pH because the invert relation to a log is not another log. But then your problem is that you can't do math.The thing is [H+]= 10^(- pH)

Patrick

Science has proof without any certainty. Creationists have certainty without
any proof. (Ashley Montague)